| Net Income | 2,452 | 2,510 | 4,254 | 2,498 | 1,630 | 1,183 | |
| Depreciation & Amortization | 684 | 680 | 672 | 634 | 557 | 551 | |
| Other Amortization | 25 | 26 | 28 | 30 | 29 | 32 | |
| Other Operating Activities | -344 | -354 | -2,058 | 1,133 | 80 | 105 | |
| Change in Accounts Receivable | 20 | 106 | 527 | -447 | -237 | -101 | |
| Change in Inventory | -10 | -10 | 18 | 12 | -68 | 8 | |
| Change in Accounts Payable | -22 | 6 | -467 | 354 | 321 | - | |
| Change in Unearned Revenue | 42 | 39 | 46 | -11 | 18 | -18 | |
| Change in Other Net Operating Assets | -57 | -35 | 89 | -54 | -39 | -9 | |
| Operating Cash Flow | 2,790 | 2,968 | 3,109 | 4,149 | 2,291 | 1,751 | |
| Operating Cash Flow Growth | -6.12% | -4.54% | -25.07% | 81.10% | 30.84% | 13.19% | |
| Capital Expenditures | -216 | -154 | -220 | -451 | -648 | -972 | |
| Other Investing Activities | -8 | -8 | -7 | - | - | - | |
| Investing Cash Flow | -224 | -162 | -227 | -451 | -648 | -972 | |
| Long-Term Debt Issued | - | 1,228 | 1,397 | 559 | 3,182 | 1,995 | |
| Long-Term Debt Repaid | - | -2,030 | -1,700 | -1,560 | -3,600 | -2,000 | |
| Net Debt Issued (Repaid) | -800 | -802 | -303 | -1,001 | -418 | -5 | |
| Common Dividends Paid | -1,578 | -1,677 | -2,013 | -1,878 | -1,287 | -1,241 | |
| Other Financing Activities | -463 | -579 | -931 | -797 | -271 | -188 | |
| Financing Cash Flow | -2,841 | -3,058 | -3,247 | -3,676 | -1,976 | -1,434 | |
| Net Cash Flow | -275 | -252 | -365 | 22 | -333 | -655 | |
| Free Cash Flow | 2,574 | 2,814 | 2,889 | 3,698 | 1,643 | 779 | |
| Free Cash Flow Growth | -9.21% | -2.60% | -21.88% | 125.08% | 110.91% | 260.65% | |
| Free Cash Flow Margin | 25.85% | 32.33% | 29.89% | 21.49% | 17.42% | 12.63% | |
| Free Cash Flow Per Share | 5.32 | 5.81 | 5.97 | 7.64 | 3.40 | 1.61 | |
| Cash Interest Paid | 816 | 841 | 748 | 777 | 812 | 904 | |
| Levered Free Cash Flow | 1,933 | 2,152 | 2,668 | 2,472 | 1,067 | 288 | |
| Unlevered Free Cash Flow | 2,392 | 2,626 | 3,155 | 2,986 | 1,557 | 824.13 | |
| Change in Working Capital | -27 | 106 | 213 | -146 | -5 | -120 | |